PORT ANGELES — Businesses in Port Angeles that serve tap water to their customers have received an unsigned letter threatening them with being blacklisted if voters favor fluoridating the city’s municipal water supply in a Nov. 7 advisory ballot measure, and if the Port Angeles City Council follows through on its pledge to follow the voters’ will.

The city council, under intense community pressure, voted in August 2016 to stop water fluoridation and put forward the general election advisory ballot.

A sample flier titled “Port Angeles Water Contaminated” and ending with the statement, “For your safety, Concerned Citizens of Our Town” was sent to the businesses.

The recipients include H2O Waterfront Bistro, Young Johnson, the owner and Port Angeles Downtown Association board president, said Monday.

It was postmarked Oct. 26.

Other restaurants also received it, she said.

In the letter to Johnson, it begins with a typed out “Dear” and then has “OWNER H20” in handwriting.

“How much business can you afford to lose?” it asks.

“Are you ready to have your restaurant/hotel/store listed on a handout warning the public that your business serves, makes or treats food items with tainted water?”

“If Port Angeles returns to putting fluoride in the public water supply, your business will be identified as one serving its patrons beverages and foods containing fluoride.”

A sample flier that would be distributed to the public that was included in the mailing is labeled “Port Angeles Water Contaminated!”

“The water being delivered to restaurants, coffee shops, bars, grocery stores, motels and hotels in the Port Angeles area is being contaminated,” the flier says.

The flier that would be handed out to visitors and the general public would include a list of businesses that serve beverages with fluoridated water and use the “contaminated water” for such purposes as washing and misting food that is labeled organic.

“Protect yourself and the ones you love by avoiding these businesses,” the letter said.